In the next year or so? Are you hired anywhere yet? If it's that long of a time frame before you have a job you've got plenty of time to try out a bunch of different guns.

First off, see what the other guys are carrying.

Secondly, does the dept provide a pistol but also give an option to carry personally owned guns?

See if you can get a copy of their firearms policy. The 220 is a great gun, but the dept may require a minimum ammo capacity. The 220 holds 9 total. Give a look at the 227; it's .45 but holds more than the 220.

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The only time you can have too much ammunition is if you're swimming or on fire!

Gun stores: Where the morbidly obese can pretend to be mercenaries, allude to past experiences in Special Ops, and overuse words like "tactical" and "piece of kit".

9mm Baretta (it was okay)
I have shot two different .40's and neither i was a big fan of, my dads .40 has a really powerful kick.
Glock 17 (not a fan)
.22 (horrible gun, jammed all the time)
.45 Kimber 1911 (loved this gun).

As mentioned above find out what your department carries and get that. They will issue you a gun. Some departments let you carry your own, but why carry a personal to beat up and get taken away if a deadly use of force occurs? My department has a list of "department approved firearms" that can be carried. They issue Glock. So I have a personal Glock that I can train with that is the same as my duty. ( I can also train with my duty.). Start there and aquire other brands/favorites as money dictates.

I think it has basically been said here, but find out what the local departments are issuing their officers and buy one of those guns.

If they issue Glock 22's, perhaps you could get a G23 or G19. I'm not sure why the G17 doesn't float your boat, though. I would bet the G22 is going to be the ticket, which means a G17 would be a fine trainer. Though, a G22 with a 9mm conversion barrel is a pretty great option, as well.

Many departments will dictate exactly what gun you will use or dictate a specific block of handguns and calibers you can choose from. This can be to support maintenence contracts, and parts availability, and training simplification, and ability to share magazines or ammo in the field. If you ask at the department that you want to be hired into, they should be able to tell you what is available.

Most departments I've seen pretty much issue only one model and caliber for service weapon. Sometimes they will have an alternative for smaller personnel, bu tusually not a lot of choices. I have seen more variety allowed for back-up handguns, but even there theyre is usually an apporved list of manufacturers and calibers.

Smith and Wesson M&P pistols are pretty nice. I know you daid you are not a Glock fan, but many departments use them. From what I have observed, most departments issue, Glock, Smith and Wesson, Sig, or Beretta firearms. Some issue H&K or FN, but those are a bit more rare. Some will allow a 1911 for more experienced officers or officers in special units.